USED Case and Finish: Solid titanium, 49mm size (as written in your image under "Model Details"). System and Compatibility: Currently running watchOS 11.4. Display: Flat Retina display protected by highly shock and scratch-resistant sapphire crystal glass. Battery: Battery life up to 36 hours of normal use (and up to 60 hours in power-saving mode). Features: Features an orange side action button, emergency siren, highly accurate GPS, and water resistance for diving and water sports. Condition: Used Color: Titanium Case Size: 49mm Connectivity: GPS